Device for automatically switching lighting devices in vehicles
First Claim
1. A device for automatically switching lighting devices in a vehicles, comprising,a sensor device (20) for detecting the light intensity in surroundings of the vehicle;
- at least one global sensor (22) provided in the sensor device for nondirectonally detecting the general light intensity in the surroundings of the vehicle;
at least one directional sensor (24) provided in the at least one global sensor for directionally detecting the light intensity at least approximately in the travel direction (14) of the vehicle;
an evaluation device (30) for comparing the current signals (S1, S2) of the sensors (22, 24) of the sensor device (20) with threshold values (SE), wherein if at least one of the threshold values (SE) is undershot, the lighting devices (10, 12) are switched on, wherein at least indirectly, the current temperature of the sensor device (20) is detected and a signal (ST) pertaining to the current temperature is delivered to the evaluation device (30) a memory, wherein in the evaluation device (30), temperature-dependent basic signals (S10, S20) of the sensors (22, 24) of the sensor device (20) are stored in the memory without incidence of light, and wherein by means of the evaluation device (30), a correction of the current signals (S1, S2) of the sensors (22, 24) of the sensor device (20) and/or of the threshold values (SE) is effected in accordance with the basic signals (S10, S20).
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Accused Products
Abstract
The device has a sensor device (20) and an evaluation device (30). The sensor device (20) has a global sensor (22), by which the general light intensity in the surroundings of the vehicle is detected nondirectionally, and a directional sensor (24), by which the light intensity is detected directionally in the travel direction of the vehicle. By the evaluation device (30), the signals (S1, S2) of the sensors (22, 24) of the sensor device (20) are compared with threshold values (SE), and if at least one threshold value (SE) is undershot, the lighting devices (10, 12) are switched on. A temperature measuring instrument (32) for detecting the temperature of the sensor device (20) is also provided, which supplies the evaluation device with a signal (ST) about the temperature. In the evaluation device (30), temperature-dependent basic signals (S10, S20) that the sensors (22, 24) generate without light incidence are stored in memory. By means of the evaluation device (30), a correction of the current signals (S1, S2) of the sensors (22, 24) of the sensor device (20) and/or of the threshold mn values (SE) is effected as a function of the basic signals (S10, S20).
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Citations
7 Claims
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1. A device for automatically switching lighting devices in a vehicles, comprising,
a sensor device (20) for detecting the light intensity in surroundings of the vehicle; -
at least one global sensor (22) provided in the sensor device for nondirectonally detecting the general light intensity in the surroundings of the vehicle;
at least one directional sensor (24) provided in the at least one global sensor for directionally detecting the light intensity at least approximately in the travel direction (14) of the vehicle;
an evaluation device (30) for comparing the current signals (S1, S2) of the sensors (22, 24) of the sensor device (20) with threshold values (SE), wherein if at least one of the threshold values (SE) is undershot, the lighting devices (10, 12) are switched on, wherein at least indirectly, the current temperature of the sensor device (20) is detected and a signal (ST) pertaining to the current temperature is delivered to the evaluation device (30) a memory, wherein in the evaluation device (30), temperature-dependent basic signals (S10, S20) of the sensors (22, 24) of the sensor device (20) are stored in the memory without incidence of light, and wherein by means of the evaluation device (30), a correction of the current signals (S1, S2) of the sensors (22, 24) of the sensor device (20) and/or of the threshold values (SE) is effected in accordance with the basic signals (S10, S20). - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification